server admn help

RoboticGolem roboticgolem at
Mon Mar 14 14:29:51 UTC 2005

I run a small mail server mainly for friends and I and I'm having a
problem.  Every week or so someone, from a different IP every time,
tries to bust into my server.  From my experience with linux I dont
see why this cant be done, I just dont know where to start.

Is there any way to have the system black list ips that fail a login
attempt 2 or 3 times and have it automatically blacklist people who
try users that dont exist?

...or if you could point me to a webpage that discusses this that
would be great.

Thanks in advance,

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